Add comprehensive internationalization (i18n) with Spanish language support
This major feature introduces complete internationalization architecture with Spanish (Mexico) as the first additional language: ## New Features: - **I18n Architecture**: Complete client-side and server-side internationalization system - **Spanish (Mexico) Support**: Full es-MX translations for all user-facing text - **Language Selector**: Dynamic language switching UI component in header - **API Endpoints**: RESTful endpoints for serving translations (/api/i18n) - **Progressive Enhancement**: Language detection via Accept-Language header and cookies ## Technical Implementation: - **Frontend**: Client-side i18n.js with automatic DOM translation and language selector - **Backend**: Server-side i18n service with locale detection middleware - **Build Process**: Automated copying of translation files to dist/ directory - **Responsive Design**: Language selector integrated into header controls layout ## Files Added: - public/i18n.js - Client-side internationalization library - src/i18n/index.ts - Server-side i18n service - src/i18n/locales/en.json - English translations - src/i18n/locales/es-MX.json - Spanish (Mexico) translations - src/routes/i18n.ts - API endpoints for translations ## Files Modified: - package.json - Updated build process to include i18n files - public/index.html - Added i18n attributes and language selector - public/app.js - Integrated dynamic translation updates - src/server.ts - Added locale detection middleware - src/scss/pages/_index.scss - Language selector styling This implementation supports easy addition of future languages and maintains backward compatibility while providing a seamless multilingual experience. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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Claude Code
parent
9b7325a9dd
commit
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10 changed files with 1006 additions and 17 deletions
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@ -1,4 +1,9 @@
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document.addEventListener('DOMContentLoaded', () => {
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// Initialize language selector
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if (window.i18n) {
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window.i18n.createLanguageSelector('language-selector-container');
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}
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const map = L.map('map').setView([42.96008, -85.67403], 10);
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L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
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@ -82,7 +87,10 @@ document.addEventListener('DOMContentLoaded', () => {
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.then(locations => {
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showMarkers(locations);
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const countElement = document.getElementById('location-count');
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countElement.textContent = `${locations.length} active report${locations.length !== 1 ? 's' : ''}`;
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const reportsText = locations.length === 1 ?
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(window.t ? window.t('map.activeReports') : 'active report') :
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(window.t ? window.t('map.activeReportsPlural') : 'active reports');
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countElement.textContent = `${locations.length} ${reportsText}`;
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// Add visual indicator of last update
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const now = new Date();
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@ -92,11 +100,13 @@ document.addEventListener('DOMContentLoaded', () => {
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minute: '2-digit',
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second: '2-digit'
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});
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countElement.title = `Last updated: ${timeStr}`;
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const lastUpdatedText = window.t ? window.t('time.lastUpdated') : 'Last updated:';
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countElement.title = `${lastUpdatedText} ${timeStr}`;
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})
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.catch(err => {
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console.error('Error fetching locations:', err);
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document.getElementById('location-count').textContent = 'Error loading locations';
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const errorText = window.t ? window.t('table.errorLoading') : 'Error loading locations';
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document.getElementById('location-count').textContent = errorText;
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});
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};
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@ -242,13 +252,15 @@ document.addEventListener('DOMContentLoaded', () => {
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.then(location => {
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// Immediately refresh all locations to show the new one
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refreshLocations();
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messageDiv.textContent = 'Location reported successfully!';
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const successText = window.t ? window.t('form.reportSubmittedMsg') : 'Location reported successfully!';
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messageDiv.textContent = successText;
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messageDiv.className = 'message success';
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locationForm.reset();
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})
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.catch(err => {
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console.error('Error reporting location:', err);
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messageDiv.textContent = 'Error reporting location.';
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const errorText = window.t ? window.t('form.submitError') : 'Error reporting location.';
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messageDiv.textContent = errorText;
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messageDiv.className = 'message error';
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})
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.finally(() => {
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267
public/i18n.js
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267
public/i18n.js
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@ -0,0 +1,267 @@
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/**
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* Frontend internationalization (i18n) service
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* Provides translation support for client-side JavaScript
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*/
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class I18nService {
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constructor() {
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this.translations = new Map();
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this.defaultLocale = 'en';
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this.availableLocales = ['en', 'es-MX'];
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this.currentLocale = this.getStoredLocale() || this.detectBrowserLocale();
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this.loadTranslations();
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}
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/**
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* Load translation data from the server
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*/
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async loadTranslations() {
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for (const locale of this.availableLocales) {
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try {
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const response = await fetch(`/api/i18n/${locale}`);
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if (response.ok) {
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const translations = await response.json();
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this.translations.set(locale, translations);
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console.log(`Loaded translations for locale: ${locale}`);
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}
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} catch (error) {
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console.error(`Failed to load translations for locale ${locale}:`, error);
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}
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}
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// Trigger translation update after loading
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this.updatePageTranslations();
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}
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/**
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* Get a translated string by key path
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*/
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t(keyPath, locale = null, params = null) {
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const targetLocale = locale || this.currentLocale;
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const translations = this.translations.get(targetLocale) || this.translations.get(this.defaultLocale);
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if (!translations) {
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console.warn(`No translations found for locale: ${targetLocale}`);
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return keyPath;
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}
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const keys = keyPath.split('.');
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let value = translations;
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for (const key of keys) {
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value = value?.[key];
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if (value === undefined) {
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// Fallback to default locale if key not found
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if (targetLocale !== this.defaultLocale) {
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return this.t(keyPath, this.defaultLocale, params);
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}
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console.warn(`Translation key not found: ${keyPath} for locale: ${targetLocale}`);
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return keyPath;
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}
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}
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if (typeof value !== 'string') {
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console.warn(`Translation value is not a string for key: ${keyPath}`);
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return keyPath;
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}
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// Replace parameters if provided
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if (params) {
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return this.replaceParams(value, params);
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}
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return value;
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}
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/**
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* Replace parameters in translation strings
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*/
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replaceParams(text, params) {
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return text.replace(/\{\{(\w+)\}\}/g, (match, key) => {
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return params[key] || match;
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});
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}
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/**
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* Set the current locale and update the UI
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*/
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async setLocale(locale) {
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if (!this.availableLocales.includes(locale)) {
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console.warn(`Unsupported locale: ${locale}`);
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return;
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}
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this.currentLocale = locale;
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this.storeLocale(locale);
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// Update HTML lang attribute
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document.documentElement.lang = locale;
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// Update page translations
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this.updatePageTranslations();
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// Trigger custom event for components to update
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window.dispatchEvent(new CustomEvent('localeChanged', { detail: { locale } }));
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}
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/**
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* Get current locale
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*/
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getLocale() {
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return this.currentLocale;
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}
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/**
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* Get available locales
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*/
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getAvailableLocales() {
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return [...this.availableLocales];
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}
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/**
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* Get locale display name
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*/
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getLocaleDisplayName(locale) {
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const displayNames = {
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'en': 'English',
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'es-MX': 'Español (México)'
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};
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return displayNames[locale] || locale;
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}
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/**
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* Detect browser's preferred locale
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*/
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detectBrowserLocale() {
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const browserLang = navigator.language || navigator.languages?.[0];
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if (!browserLang) {
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return this.defaultLocale;
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}
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// Check for exact match first
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if (this.availableLocales.includes(browserLang)) {
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return browserLang;
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}
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// Check for language match (e.g., "es" matches "es-MX")
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const languageCode = browserLang.split('-')[0];
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const matchingLocale = this.availableLocales.find(locale =>
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locale.startsWith(languageCode)
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);
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return matchingLocale || this.defaultLocale;
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}
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/**
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* Store locale preference in localStorage
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*/
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storeLocale(locale) {
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try {
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localStorage.setItem('preferredLocale', locale);
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} catch (error) {
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console.warn('Failed to store locale preference:', error);
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}
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}
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/**
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* Get stored locale preference from localStorage
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*/
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getStoredLocale() {
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try {
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return localStorage.getItem('preferredLocale');
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} catch (error) {
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console.warn('Failed to get stored locale preference:', error);
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return null;
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}
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}
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/**
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* Update page translations using data-i18n attributes
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*/
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updatePageTranslations() {
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// Update elements with data-i18n attribute
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document.querySelectorAll('[data-i18n]').forEach(element => {
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const key = element.getAttribute('data-i18n');
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const translation = this.t(key);
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if (element.tagName === 'INPUT' && (element.type === 'text' || element.type === 'password')) {
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element.placeholder = translation;
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} else if (element.hasAttribute('title')) {
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element.title = translation;
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} else {
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element.textContent = translation;
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}
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});
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// Update elements with data-i18n-html attribute (for HTML content)
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document.querySelectorAll('[data-i18n-html]').forEach(element => {
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const key = element.getAttribute('data-i18n-html');
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const translation = this.t(key);
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element.innerHTML = translation;
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});
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// Update page title if it has translation
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const titleElement = document.querySelector('title[data-i18n]');
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if (titleElement) {
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const key = titleElement.getAttribute('data-i18n');
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document.title = this.t(key);
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}
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// Update meta description if it has translation
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const metaDescription = document.querySelector('meta[name="description"][data-i18n]');
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if (metaDescription) {
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const key = metaDescription.getAttribute('data-i18n');
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metaDescription.content = this.t(key);
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}
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}
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/**
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* Create language selector dropdown
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*/
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createLanguageSelector(containerId) {
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const container = document.getElementById(containerId);
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if (!container) {
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console.warn(`Container with id "${containerId}" not found`);
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return;
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}
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const select = document.createElement('select');
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select.id = 'language-selector';
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select.className = 'language-selector';
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select.title = this.t('common.selectLanguage');
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// Add options for each available locale
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this.availableLocales.forEach(locale => {
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const option = document.createElement('option');
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option.value = locale;
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option.textContent = this.getLocaleDisplayName(locale);
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option.selected = locale === this.currentLocale;
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select.appendChild(option);
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});
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// Add change event listener
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select.addEventListener('change', (event) => {
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this.setLocale(event.target.value);
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});
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container.appendChild(select);
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}
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}
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// Create global instance
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window.i18n = new I18nService();
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// Helper function for easier access
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window.t = function(keyPath, locale = null, params = null) {
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return window.i18n.t(keyPath, locale, params);
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};
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// Auto-initialize when DOM is ready
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', () => {
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window.i18n.loadTranslations();
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});
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} else {
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window.i18n.loadTranslations();
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}
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Great Lakes Ice Report</title>
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<title data-i18n="common.appName">Great Lakes Ice Report</title>
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<!-- PWA Meta Tags -->
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<meta name="description" content="Community-driven winter road conditions and icy hazards tracker for the Great Lakes region">
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<meta name="description" content="Community-driven winter road conditions and icy hazards tracker for the Great Lakes region" data-i18n="meta.description">
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<meta name="theme-color" content="#2196F3">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<meta name="apple-mobile-web-app-status-bar-style" content="default">
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.nojs-fallback { display: block !important; }
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</style>
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</noscript>
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<!-- Internationalization -->
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<script src="i18n.js"></script>
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</head>
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<body>
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<div class="container">
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<header>
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<div class="header-content">
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<div class="header-text">
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<h1>❄️ Great Lakes Ice Report</h1>
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<p>Community-reported ICEy road conditions and winter hazards (auto-expire after 48 hours)</p>
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<h1 data-i18n="common.appName">❄️ Great Lakes Ice Report</h1>
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<p data-i18n="meta.subtitle">Community-reported ICEy road conditions and winter hazards (auto-expire after 48 hours)</p>
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</div>
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<div class="header-controls">
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<div id="language-selector-container" class="language-selector-container"></div>
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<button id="theme-toggle" class="theme-toggle js-only" title="Toggle dark mode" data-i18n="common.darkMode">
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<span class="theme-icon">🌙</span>
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</button>
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</div>
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<button id="theme-toggle" class="theme-toggle js-only" title="Toggle dark mode">
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<span class="theme-icon">🌙</span>
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</button>
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</div>
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</header>
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</noscript>
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<div class="form-section">
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<h2>Report ICEy Conditions</h2>
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<h2 data-i18n="form.reportConditions">Report ICEy Conditions</h2>
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<form id="location-form" method="POST" action="/submit-report">
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<div class="form-group">
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<label for="address">Address or Location *</label>
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<label for="address" data-i18n="form.addressLabel">Address or Location *</label>
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<div class="autocomplete-container">
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<input type="text" id="address" name="address" required
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placeholder="Enter address, intersection (e.g., Main St & Second St, City), or landmark"
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<div class="reports-header">
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<h2>Current Reports</h2>
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<div class="view-toggle js-only">
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<button id="map-view-btn" class="toggle-btn active">📍 Map View</button>
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<button id="table-view-btn" class="toggle-btn">📋 Table View</button>
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<button id="map-view-btn" class="toggle-btn active" data-i18n="navigation.mapView">📍 Map View</button>
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<button id="table-view-btn" class="toggle-btn" data-i18n="navigation.tableView">📋 Table View</button>
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<a href="/table" class="toggle-btn" style="text-decoration: none; line-height: normal;" title="Server-side view that works without JavaScript">📊 Basic View</a>
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</div>
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<noscript>
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